Improved door-bolt



dinited f tant 'LEVI B. swARTz AND JAMES M. OPDYCKE, OF LUMBEVILLEPENNSYLVANIA.

Letters Patent No. 91,180, dated June 8, 1869.

IMPRovnD Doon-BOLT.

The Schedule referred to 1n these Letters Patent and making part of thesame.

To all whom it ma/y conce/rn:

Beit known that we, LvI B. Swnn'rz and JAMES l M. OPDYCKE, ofLumbervillefin the county of Bucks,

and in the State' of PennsylvI nia, have invented new and usefulvImprovements in Door-Bolts; and do hereby declare that the followingisl a full, clear, and exact description thereof', reference-beinghad tothe accompanying drawings, and tothe letters of reference i A, scribed.

Figure 1 is a side elevation of our bolt, with the side removed, so asto show its internal construction.

Figure 2 is a plan view of the same, with the top.

removed.

-LetterA represents the frameA of our bolt, `which may be constructed ofany` suitable` size or material,

and which isdivided into two apartments, one muchV larger that 'theother.

Y lattached-t0 this frame, one on top and the other on There are twobolts, or'slides the opposite side, and are both moved backward andforward by the pin B, which 'passes entirely`through the frame, andwhich plays in a slot cut in both top and bottom. The longer one gfthese slides, O, on

the face, has a -mortise cut in it, on the side toward the frame, andtwo openings entirely through, one for the pin B and the` other for th'ekey.

At thefrward end of the `longer apartment there is' placed thedrum D,which has a screw-thread cut around its periphery, as seen in fig. 1.Upon both top -and bottomof this drum there is a rod-like projection,`the ends of which areso formed that the key E can be placed upon them,for the purpose of turning the drum. 1 v

Playing up and down inan-I opening out in the side of the partitionbetween the apartments, there is a notched bolt,F, which is raisedfromor lowered into v the mortis'e in the slide O by means of thescrewthread cut in the sides of the drum. When this bolt is depressed,the end prevents the slide from being moved.

Placed in the small apartment is the spring G, which has one endfastenedto the frame, is then curved around a pin, to keep it in place, pressesagainst the cam H, andhas its other end passed through the partition,andiits in a notch cut in the side of the bolt F. When the bolt ispressed down, the end of. this spring tits in this notch, and preventsthe bolt from being raised so as to unlock the slide.

Passing up through the frame, and connected to the cam, there is ascrew, by means of which the 'cam is operated. vUpon the end of the keyE there is placed a small sharp\projection, for fitting this screw. Whenthis is inserted in the screw-head and turned around, the shoulder onthe camhis pressed against the spring, so as to press it out of thenotch in the bolt, when it can be readily raised by applying the key tothe drum,

vas seen in fig. 1.

Having thus described our invention,

What we claim, and desire to secure by Letters Patent, is-

1. The hollow frame A, divided into two apartments, an slotted asdescribed, in combination with the two slides C and I, and pin B, whenused in the manner and for the purpose set forth.

2. The drum D, grooved as set forth, in combination with the notchedbolt F, cam H, and spring G, when used in the manner speciied.

3. The arrangement of the frame A, slides C and I, spring G, pin B, camH, and notched bolt F, when all are combined for the purpose set forth.

,In testimony that we claim thev foregoing, we have hereunto set ourhands, this 24th day of March, 1869.

LEVI B. SWARTZ. JAMES M. OPDYOKE.

Witnesses:

E. H. HOUGH, HENRY Hoven.

